I'm ordering a new PC this week, this is the list of parts I went with. Feel free to look at it and see if you like anything there. The X38 is a great motherboard with a lot of overclocking headroom, great for Crossfire. I also decided to go with the 3870 X2, and will get a second one when a driver is released that supports 2 in Crossfire.

I saw the thread with fit having major problems with his 780, but he seems a rare exception. I know he thinks its the motherboard, and I don't want to cast doubt on him...but he went through 5 brand new boards and all developed the same problem. I gotta believe its another piece of hardware he has not getting along with the 780. Any piece of hardware, even the best, someone out there will have a horror story using it. I wouldn't be scared to go with the 780, just do some research and see what hardware others have used with it and see what works well.

I *think* that the P35 can only do 16x lanes and 4x on the other while in Crossfire. The X38 allows 16x lanes on both PCI-E slots, which results in better performance. Someone else will have to confirm that, I've never had a crossfire build and I'm sure others know more than I do. It wasn't until recently though that you could have 16x lanes on both cards in a Crossfire setup.